Harrow.



No. 838,975. PATENTED DEG. 1s, 1906.

A. PRIBDBMANN.

HARROW APPLICATION FILED JUNE 7, 1906.

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,M/ caff' www AUGUST FRIEDEMANN, OF VVAVERLY, IOWA.

HARROW.

Specification of Letters Patent.

Patented nec. i8, 1906.

Application filed June 7,1906. Serial No. 320.546.

To @ZZ whom, it may concern:

Be it known that I, AUGUST FRIEDEMANN, a citizen of the United States,and a resident of Waverly, in the county of Bremer and State of Iowa,have invented a new and useful Improvement in Harrows, of which thefollowing is a specification.

My invention is intended particularly to improve the construction ofharrows shown in my Patent No. 819,748, dated May 8, 1906, the objectbeing the provision of an implement of this class which will possessgreat flexibility in operation and easily adjust itself to the nature ofthe ground over which it travels; which will be self-cleaning while inuse and prevent clogging of the teeth of the harrow; which may becompactly and conveniently folded when not in use for transportation,which shall be efficient in operation and withal constitute a superiormeans for performing the requisite functions of a relatively perfect-harrow.

With these and other objects in view the invention consists in animproved implement comprised of harrow-sections joined by the usualevener or draft bar, and the several harrow-sections are composed ofsecondary sections iiexibly connected together by frame-bars, and theselatter sections may include one or more toothed bars, which are in turnflexibly connected to the frame or cross bars of the harrow and theinvention further consists in certain novel features of construction andcombinations and arrangements of parts, as hereinafter pointed out.

In the accompanying drawings I have illustrated one example of thephysical embodiment of my invention constructed according to the bestmode I have so far devised for the practical application of theprinciple.

Figure l is a top plan view of a harrow embodying the improved featuresof my invention. Fig. 2 is a transverse sectional view on line 2 2, Fig.l. Fig. 3 is an enlarged detail view illustrating the flexibleconnection between one of the tooth-bars and a section of one of thecross-bars. Fig. 4 is a cross-section on line 4 4, Fig. 1. Fig. 5 is anend view ofthe harrow as it appears when in folded position ready fortransportation.

In the drawings I have shown an implement composed of two sections, as AA; but

it will be understood that as many sections may be coupled up andutilized as desired.

The tooth or drag bars 1 of the harrow-sections are provided with theusual teeth 2, which teeth are rigidly held in the bars, and the barsare each flexibly jointed by means of the eyebolts 3 and 4 to thesectional frame or cross bars of the harrow. The bolts 3 and 4 are eachfirmly embedded in their respeci tive bars and secured by nuts, and theeyes of the bolts are looped together to form hinged or swinging joints.

The tooth-bars are fashioned in cross-section, as in my patent abovereferred to, and are jointed to the sectional cross-bars to permit aforward or rearward swinging movement, so that the harrow may bereversed conveniently, the teeth in all cases standing normally at anangle of forty-five degrees when the harrow is Working, and the staggered relation of the tooth-bars to the frame or cross bars insures aproper line of travel of the drag-teeth.

The frame or cross bars 5 of the harrow, as illustrated, are constructedin sections, in this instance the frame-bars being shown as composed ofthree members or sections. In Fig. l the front sections or members ofthe frame-bars each consists of a short bar, as 6, and the rear sectionsor members are com`v posed of short bars 7. These bars 6 and 7 are eachiieXibly connected to ether by the intermediate sections 8, whic lattersections consist of a pair of parallel bars having bolts 9 and l0 passedthrough the ends thereof, and these bolts also pass through holes at theinner ends of the bars 6 and 7 and are secured by nuts, thus providinghinged joints at the ends of the intermediate members of the frame orcross bar.

To reduce frictional wear on the wooden parts at the joints, I providemetallic thimbles, as 6 and 7, on the front and rear bars, respectively,and similar thimbles 8 on the ends of the bars of the intermediatesections. These thimbles are inserted in openings inl the ends of thewooden bars and form journals for the bolts 9 and 10. Y

A stay-plate 11 may be secured to the two bars of the intermediatesection 8 by bolts 12 l2 to secure rigidity of the members. Y

As will be observed from the drawings, the front and rear sections ofthe cross or ame IOO bars have connected thereto each a pair oftooth-bars, and the intermediate sections of the frame-bars have asingle toothed bar jointed thereto.

The draft-bar or evener 13 may be connected at either end of theharrow-sections by means of the hooks 14, which are adapted to connectwith the clevises 15 at the front end of the harrow .in Fig. 1 or withsimilar clevises 16 at the rear end in said figure, these clevises beingpivotally secured at the outer ends of the sectional cross or frame barsby bolts 15 and 16, respectively, and secured by nuts, as usual.

When it is desired to reverse the travel of the implement, the evener 13may be attached to the clevises 16, and a pullon the evener by a team ofhorses will cause the drag or tooth bars to swing on their hingedjoints, (bolts 3 and 4,) and the teeth 1 will incline in reversedirection to that of their former inclination.

In Fig. 5 the harrow is illustrated in folded and compact position fortransportation, and when so folded the implement may be convenientlyloaded upon a wagon. In folding the sections of the harrow the sectionalcrossbars are folded under, the tooth-bars being artly inclosed by thesections of the crossldars, and the teeth onthe tooth-bars pointinwardly, rendering the folded harrow convenient in handling.

In the drawings I have illustrated the intermediate members of thesectional. crossbars with one toothbar attached and each of the twoouter members of the cross-bar with two tooth-bars jointed thereto; butit is obvious that this arrangement maybe varied as desired.

The rocking of the separate sections of the harrow formed by thesectional cross-bars makes the device self-cleaning and prevents theaccumulation of cornstalks, &c., to clog the teeth of the harro'w.

The tooth-bars by means of their beveled upper edges (shown incross-section) and the connection of the eyebolts 3 and 4 permit theharrow-teeth to slant in either of two directions at an angle offorty-iive degrees to the perpendicular, depending upon the side Ytowhich the draft-team is hitched.

The construction whereby the two pairs of outer tooth-bars are eachconnected in pairs to the two outer members of the cross-bars secures aflexible cross-bar and permits the harrow to adjust itself to the natureof the ground being worked.

From the above description, taken in connection with the drawings, it isevident that I have produced an implement which fulfils the conditionsset forth as the objects Yand purposes of my invention.

What I claim is-'- 1. In a harrow, the combination with a draft-bar, ofa plurality of sectional framebars extending transversely thereto, boltspassed through the adjoining ends of the sections of the frame-bars, andwearing-thimbles surrounding said bolts, and toothed bars connected withthe sections of the frame-bars.

2. The combination with a draft-bar of a plurality of hinged sectionalframe-bars, a series of toothed bars located in planes parallel with thedraft-bar, and flexible joints consisting of eyebolts passed through thebars and having their eyes looped together.

3. In a harrow the combination with a plurality of flexible frame-bars,of a series of toothed bars each having its upper edges beveled, and aflexible connection between said frame-bars and toothed bars, wherebythe swinging movement of the latter is limited by the beveled edges.

t. In a harrow, the combination with sectional cross or frame bars, of atooth-bar connected with the intermediate section of the frame-bars, andtwo toothed bars connected to each of the outer sections of thesectional cross-bars, substantially as set forth.

5. In a harrow, the combination of a plurality of frame-bars and one ormore tooth bars each connected pivotally to the under side of theframe-bars so that it may swing in relation to said frame-bars so as topermit the teeth of said toothed bars to point at a rearward angle ineither direction of motion of the harrow, the said toothed bars beingshaped so as to rest against the under sides of the frame-bars when theteeth are in the proper working position.

6. In a harrow, a section comprising in combination a plurality offlexible framebars each consisting of a plurality of sections pivotallyconnected together, two toothed bars connected to opposite sections ofsaid frame-bars, a single toothed bar connected to opposite intermediatesections of said frame-bars, and two toothed bars connected to anotheropposite set of sections of said frame-bars.

7. In a harrow, a section comprising two frame-bars each consisting oftwo end pieces and a center piece pivotally connected with each of theend pieces, two toothed bars having a swinging connection with each twocorresponding end pieces of said frame-bars, and a single toothed barhaving a swinging connection with the intermediate pieces of saidframe-bars.

8. In a harrow, a section comprising in combination two toothed bars;two frame members, to each of which both of said bars are connected bymeans of eyebolts permitting the bars to swing in relation to the framemembers two other toothed bars and two other frame members to which saidtoothed bars are similarly connected, and two intermediate frame memberseach consisting of two pieces connected together, between the ends ofwhich the inner ends of the corre- IOO IIC

sponding two frame members first mentioned lie, and to which they arepivotally connected and a single toothed bar connected in a similar'manner to said intermediate frame members.

9. In a harrow the combination of a draftbar and one or more reversibleharrow-seo tions to which said draft-bar may be connected at either endbyreadily-removable attachments, each of said sections comprising incombination a plurality of toothed bars connected together near each endby a erossbar so that they may have a certain forwardand-baokwardmovement in relation to said cross-bars; another plurality of toothedbars similarly connected near each end by two other cross-bars; a singletoothed bar oonneoted near each end in a similar manner to one of twoother Cross-bars; the said crossbars to which said single toothed bar 1soonneeted being placed intermediate the corresponding cross-bars to eaehof which a plurality of toothed bars is connected7 and pivotally linkedto said bars.

l0, In a harrow, a toothed-bar section comprising three minor sectionsof which the two outer sections consist of two toothed bars eachconnected by a plurality of rigid cross-bars, and the inner sectionconsists of a single toothed bar Connected to a plurality ofintermediate orossebars7 the intermediate cross-bars being p ivotallyconnected to the outer Cross-bars.

In testimony whereof I have afliXed my signature in the presence of twowitnesses.

AUGUST FRIEDEMANN.

l/Vtnesses:

F. E. FARWELL, F. P. HAGEMANN.

